I agree 100% with you on the merits of the throttle when it is 100% working.I think I saw another post somewhere saying you couldn't get them separately, which isn't ideal for those of us who want to mix and match. You may end up buying the set and having to ebay the flight stick (or maybe you will like it and keep it).
The throttle in my opinion is wonderful, its solid and has a ton of buttons, switches, hats, rockers, axis. You could actually pilot a ship just using the throttle section of the HOTAS, I haven't tried this and don't recommend it but this does demonstrate how flexible it is. That said, others have had a bad time with the throttle, failure of components quite early on. I have had no such issues with mine, works perfectly and hope it continues to do so. Good luck whatever you decide.
I was just pondering my options regarding my throttle situation. AS it stands now the throttle still works just fine for me since the (as you mentioned) "ton" of available buttons and switched have allowed me to remap away from the failing buttons.
My concern is the situation will spread and worsen as time goes on.
Props to you that yours is still fully functional!!!
Fly well Cmdr,,,,,